Hi Ken, hi all

Thanks for your suggestion! So here more details:

(A) How to reproduce:

(1)Start emacs as
     emacs -Q.

(2)Execute the following lisp code in the scratch buffer:
     (progn
       (setq explicit-bash-args '("--noediting" "-i"))
       (setq shell-file-name "bash")
       (setenv "SHELL" "bash"))

(3) Invoke a shell via M-x shell and you get:
         bash: cannot set terminal process group (-1): Inappropriate  
ioctl for device
         bash: no job control in this shell
         $

(B) My environment:
I'm running emacs with the following version string:
    GNU Emacs 23.4.1 (i386-mingw-nt6.1.7601) of 2012-02-05 on MARVIN

Cygwin cygcheck output attached.

How can I fix this?

Many, many thanks for any pointers, Leo

 > Hi there
 >
 > I upgraded my Cygwin installation to Cygwin dll 1.7.11-1. Since  
then when I start Cygwin bash under emacs i get the following error  
message:
 >
 > 	bash: cannot set terminal process group (-1): Inappropriate ioctl  
for device
 > 	bash: no job control in this shell
 >
 > And indeed, I can't stop subprocesses in this shell, which is very  
inconvenient.
 >
 > BTW, I invoke bash in emacs with the arguments "--noediting -i".  
Both are needed.
 >
 > What can I do about the error message?